Like many before me, I need help in my Layout design

Have been browsing thru this Layout Design Forum for some time and have gotten some really good ideas but have not been able to get what I need.  Currently my layout in the photo is 8'x10' using Atlas track.  The outer loop is 072 then second loop is 063 and inner loop is 054.  I have also four 054 switches.  I would like to keep the outer loop 072 and elevate the 063 , 6.5" all the way around the table.  The inner loop i want to keep using the 054 tracks and I would like to have a crossover somewhere in the center area.  Or if there is a better way, I am open to all suggestions.  I would like to use as much as the tracks I currently have but if needed to buy a smaller curve again I am open to that.